AD7476ABRM datasheet(9/28 Pages) AD

номер детали	AD7476ABRM

подробное описание детали	2.35 V to 5.25 V, 1 MSPS 12-/10-/8-Bit ADCs in 6-Lead SC70

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AD7476A/AD7477A/AD7478A

Rev. F | Page 9 of 28

Timing Diagrams

TO OUTPUT

CL

50pF

200

µA

IOH

200

µA

IOL

1.6V

Figure 2. Load Circuit for Digital Output Timing Specifications

Timing Example 1

Having fSCLK = 20 MHz and a throughput of 1 MSPS, a cycle

time of

t2 + 12.5 (1/fSCLK) + tACQ = 1 µs

where:

t2 = 10 ns min, leaving tACQ to be 365 ns. This 365 ns satisfies the

requirement of 250 ns for tACQ.

From Figure 4, tACQ is comprised of

2.5 (1/fSCLK) + t8 + tQUIET

where:

t8 = 36 ns maximum. This allows a value of 204 ns for tQUIET,

satisfying the minimum requirement of 50 ns.

Timing Example 2

Having fSCLK = 5 MHz and a throughput is 315 kSPS yields a

cycle time of

t2 + 12.5 (1/fSCLK) + tACQ = 3.174 µs

where:

t2 = 10 ns min, this leaves tACQ to be 664 ns. This 664 ns satisfies

the requirement of 250 ns for tACQ.

From Figure 4, tACQ is comprised of

2.5 (1/fSCLK) + t8 + tQUIET, t8 = 36 ns maximum

This allows a value of 128 ns for tQUIET, satisfying the minimum

requirement of 50 ns.

In this example and with other, slower clock values, the signal

may already be acquired before the conversion is complete, but

it is still necessary to leave 50 ns minimum tQUIET between

conversions. In Example 2, acquire the signal fully at

approximately Point C in Figure 4.

CS

SCLK

SDATA

t2

t6

t3

t4

t7

t5

t8

tCONVERT

tQUIET

ZERO

DB11

DB10

DB2

DB1

DB0

B

THREE-STATE

THREE-

STATE

Z

4 LEADING ZEROS

1

3

13

14

15

16

t1

4

5

2

Figure 3. AD7476A Serial Interface Timing Diagram

CS

SCLK

t2

tCONVERT

B

1

2

5

13

14

15

16

C

t8

tQUIET

tACQ

12.5(1/fSCLK)

1/THROUGHPUT

3

4

Figure 4. Serial Interface Timing Example

Аналогичный номер детали - AD7476ABRM

производитель	номер детали	датащи	подробное описание детали
Analog Devices	AD7476ABRM	580Kb / 24P	2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70 REV. C
	AD7476ABRM-REEL	580Kb / 24P	2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70 REV. C
	AD7476ABRM-REEL7	580Kb / 24P	2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70 REV. C

More results

Аналогичное описание - AD7476ABRM

производитель	номер детали	датащи	подробное описание детали
Analog Devices	AD7476A	689Kb / 29P	2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70 Rev. F
	AD7476A	580Kb / 24P	2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70 REV. C
	AD7477A	689Kb / 29P	2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70 Rev. F
	AD7478A	689Kb / 29P	2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70 Rev. F
	AD7922	392Kb / 32P	2-Channel, 2.35 V to 5.25 V, 1 MSPS, 10-/12-Bit ADCs REV. 0
	AD7912	392Kb / 32P	2-Channel, 2.35 V to 5.25 V, 1 MSPS, 10-/12-Bit ADCs REV. 0
	AD7912	386Kb / 32P	2-Channel, 2.35 V to 5.25 V, 1 MSPS, 10-/12-Bit ADCs REV. 0
	AD7911	312Kb / 28P	2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs REV. 0
	AD7921ARMZ	353Kb / 28P	2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs REV. A
	AD7911	353Kb / 28P	2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs REV. A

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